Renesas X9313UMZT1

Overview

X9313UMZT1 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 3-wire serial interface (CS/U/D/INC), nonvolatile wiper position storage, and 50 kΩ end-to-end resistance. It operates from 3V to 5.5V, supports terminal voltages from –VCC to +VCC, and functions as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9313UMZT1 datasheet, X9313UMZT1 pinout, X9313UMZT1 application, or X9313UMZT1 equivalent, key selection considerations include its 50 kΩ RTOTAL, MSOP-8 package, ±20% resistance tolerance, 100,000-cycle endurance, and power-up recall of stored wiper position - critical for calibration-critical systems requiring repeatable startup behavior.

Technical Context

The X9313UMZT1 implements a 31-element resistor array with make-before-break wiper switching, enabling glitch-free tap transitions. Its 5-bit up/down counter drives a decoder that selects one of 32 wiper positions, with direction controlled by U/D and step triggered by negative-edge INC while CS is low.

Wiper position is stored into nonvolatile memory when CS rises while INC is high, and automatically recalled at power-up. The device supports bidirectional wiper movement without wraparound, and maintains wiper state during standby with only 500 µA max current draw.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free matte tin finish, body dimensions 3.0 mm × 3.0 mm × 0.85 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with AD5175BRMZ-50 and MCP41050-I/P, the X9313UMZT1 offers unique advantages in minimal GPIO usage (3-wire), guaranteed power-up repeatability, and ±VCC terminal voltage tolerance - making it optimal for embedded analog subsystems with constrained MCU resources and strict startup determinism requirements.

Availability

X9313UMZT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, audio level control, and precision analog trimming requiring stable component supply and long-term calibration retention.

Supply support for X9313UMZT1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil Corporation is a precision analog and power management semiconductor company, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9313 product line was designed for robust, nonvolatile analog trimming in harsh environments - targeting applications where mechanical potentiometers fail due to wear, contamination, or thermal drift.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UMZT1?

The X9313UMZT1 supports a maximum differential voltage ΔV = |VH − VL| of 10 V, as specified for X9313U-series devices. This rating holds across the full operating temperature range (0°C to +70°C) and enables use in 10 V full-scale industrial signal chains without external attenuation. Exceeding this limit risks irreversible damage to the internal resistor array switches.

Does X9313UMZT1 require an external clock or MCU firmware to retain wiper position after power loss?

No, X9313UMZT1 does not require external clock or MCU firmware to retain wiper position. Its integrated nonvolatile memory stores the wiper setting upon command (CS↑ with INC=HIGH) and automatically recalls it at next power-up. The device retains data for 100 years without auxiliary power, eliminating dependency on host controller initialization routines.

Can X9313UMZT1 be used with bipolar analog signals such as ±5V?

Yes, X9313UMZT1 supports terminal voltages from –VCC to +VCC. With VCC = 5 V, RH/VH and RL/VL can swing from –5 V to +5 V relative to VSS, enabling direct use in bipolar op-amp circuits, AC-coupled signal paths, and dual-supply sensor interfaces without level-shifting components.

What is the wiper resistance specification for X9313UMZT1 at 3.3V supply?

The X9313UMZT1 wiper resistance (RW) is specified at VCC = 5 V (typ. 40 Ω, max 100 Ω). While not explicitly tested at 3.3 V, the datasheet confirms operation down to 3 V, and typical wiper resistance scales approximately linearly with supply - thus RW at 3.3 V is estimated ≤70 Ω. For critical low-resistance applications, verify with actual measurement under target conditions.

How does the make-before-break switching behavior affect signal integrity in X9313UMZT1?

The X9313UMZT1's make-before-break wiper switching prevents momentary open-circuit states during tap transitions, avoiding signal dropout or transient spikes. During multi-tap moves, adjacent taps connect briefly (tIW = 5 µs), causing temporary RTOTAL reduction - acceptable in most analog control loops but may induce brief gain modulation in high-fidelity audio paths if updated rapidly.